3 PYREX 3 Ringed Cobalt Blue Ramekin Custard Cups - #463 , 6 ounce / 175mL The 3 PYREX 3 Ringed Cobalt Blue Ramekin Custard Cups are vintage mid-century modern set that are perfect for all occasions. Made in America in the late 20th century, these round, glossy blue cups feature a solid color and are stackable for easy storage. With a production style of cobalt glass, these original PYREX cups have an impressed backstamp and are part of the Pyrex product line. Ideal for serving custard or other desserts, these 6 ounce cups are a stylish and practical addition to any kitchen collection.